Burning bootloader

ISP 10-6 Pins converter: It's really helpful to convert ISP 10 pins to ISP 6 pins, and also help you to remember the pins for ISP-6, because the silk print indicate it! Works for all the ISP-10 programmer.And Arduino only have 6-pin ISCP connector

Your arduino board: The MCU is already on the board and need to be programmed.

Connect the programmer with the converter like below, only need to remember MISO is always to PIN1:

Connect the board with USBASP to your laptop and burn, no need USB connect to the board anymore